Why not =) ! It's not a huge change and it will not shatter the game.
In my opinion, the All Star Weekend is just fantasy but still is a pleasant aspect of BuzzerBeater. An exhibition match against the potential best players of BuzzerBeater can be a nice thing. Especially if we turn the "World Buzzerbeater All Star match" like :
North America Vs. World
South America Vs. World
Europe Vs. World
Asia Vs. World
& each year we'll change the host continent of the match.